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Bioactivity of Excoecaria agallocha / Bioatividade de Excoecaria agallocha
Subhan, Nusrat; Alam, Mohammad Ashraful; Ahmed, Firoj; Shahid, Israt Jahan; Nahar, Lutfun; Sarker, Satyajit Dey.
  • Subhan, Nusrat; Northern University. Department of Pharmacy. Dhaka. BD
  • Alam, Mohammad Ashraful; Stamford University. Department of Pharmacy. Dhaka. BD
  • Ahmed, Firoj; Khulna University. Pharmacy Discipline. Phytochemical and Pharmacognosy Laboratory. Khulna. BD
  • Shahid, Israt Jahan; Khulna University. Pharmacy Discipline. Phytochemical and Pharmacognosy Laboratory. Khulna. BD
  • Nahar, Lutfun; University of Ulster. School of Biomedical Sciences. Londonderry. GB
  • Sarker, Satyajit Dey; University of Ulster. School of Biomedical Sciences. Londonderry. GB
Rev. bras. farmacogn ; 18(4): 521-526, Oct.-Dec. 2008. tab
Article in English | LILACS | ID: lil-509043
ABSTRACT
The results of neuropharmacological, microbiological and toxicological studies on the ethanol extract of the bark of Excoecaria agallocha are reported. The extract (100 and 200 mg/kg dosages) was found to produce a profound decrease in exploratory activity in a dose-dependent manner. It also showed a marked sedative effect as evidenced by a significant reduction in gross behaviour and potentiation of sodium thiopental-induced sleeping time. The totality of these effects showed that the extract possesses depressant action on the central nervous system (CNS). The extract of E. agallocha exhibited significant in vitro antibacterial activity against Staphylococcus aureus, Shigella dysenteriae, Shigella sonnei and Enterococci with the zones of inhibition ranging from 11 to 15 mm. While the extract showed considerable brine shrimp toxicity (LD50 = 20 mg/mL), it displayed only low level of toxicity in mice.
RESUMO
Os resultados dos estudos neurofarmacológicos, microbiológicos e toxicológicos do extrato etanólico da casca de Excoecaria agallocha são reportados. O extrato (dosagens de 100 e 200 mg/kg) produziu uma diminuição profunda na atividade exploratória de maneira dose-dependente. Ele também mostrou um efeito sedativo marcante conforme evidenciado por uma redução significativa no comportamento total e potencialização do tempo de sono induzido por tiopental sódico. A totalidade destes efeitos mostrou que o extrato possui ação depressora sobre o sistema nervoso central (SNC). O extrato de E. agallocha exibiu significante atividade antibacteriana in vitro contra Staphylococcus aureus, Shigella dysenteriae, Shigella sonnei e Enterococci com as zonas de inibição medindo entre 11 a 15 mm. Enquanto o extrato mostrou considerável toxicidade em Artemia salina (DL50 = 20 mg/mL), ele exibiu apenas baixo nível de toxicidade em camundongos.

Full text: Available Index: LILACS (Americas) Language: English Journal: Rev. bras. farmacogn Journal subject: Pharmacy Year: 2008 Type: Article Affiliation country: Bangladesh / United kingdom Institution/Affiliation country: Khulna University/BD / Northern University/BD / Stamford University/BD / University of Ulster/GB

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Full text: Available Index: LILACS (Americas) Language: English Journal: Rev. bras. farmacogn Journal subject: Pharmacy Year: 2008 Type: Article Affiliation country: Bangladesh / United kingdom Institution/Affiliation country: Khulna University/BD / Northern University/BD / Stamford University/BD / University of Ulster/GB